Hi All:
Having had the dubious pleasure of commanding an M113 when it peeled out of its left track at speed, I can relate to the poor crew commander's predicament. I suspect he wasn't going too fast, especially if he was about to turn or had started the turn when the track broke.
In the lower right corner of the big photo you can just make out a lump that may be the end of the track. If he came off and rolled straight ahead thats the most likely place for it to be sitting. There are no gouges in the macadam to indicate that he slewed to a stop.
As for the white bar on the idler... its highly polished steel reflecting light. The idlers on Rams were plain steel and would be absolutely gleaming after many miles of rubbing against the rubber backed track (the drive sprocket indicates that this Ram was not fitted with CDP track). T41 track (the most common on Rams) backside was metal and rubber so the idler would get well polished.
Is it possible that the CT number ends in 7 and it just looks like a "T"?
I won't even guess about the truck.
Cheers! Mike